Safety device for dumping vehicles



G. W. BERRY.

SAFETY DEVICE FOR DUMPING VEHICLES. APPLICATION FILED FEB. 23, I921} IAMQ Patented Jan. 24,1922}.

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G. W. BERRY. SAFETY DEVICE FOR DUMPING VEHICLES.

APPLICATION FILED FEB. 23. I921.-

Patented Jan. 24,, 1922.

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. GEORGE W. BERRY, 01E ERIE, FENNSYLVANIAi.

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nrnaeea specification of Letters Patent. Patntqjl Jan 2 1 31922Application filed February/ 23, 1921. Serial No. 447,297.

To all whom it may concern:

Be it known that l, GEORGE W. BERRY, a citizen of the United States,residing at Erie, in the county of Erie and State of Pennsylvania, haveinvented certain new and useful Improvements in a Safety Devicetomatically actuated safety latching means for hydraulic hoist mechanismdescribed and claimed in my pending applications for U. S. patent filedon the 9th day of June 1919 and on the 3rd day of April 1920, seriallynumbered 302,880 and 37 1,0415, respectively.

The primary object of my invention is the provision of a device or meansof this character, wherein thecontrol valve of the hydraulic hoistmechanism forming the subject matter of the foregoing named applicationscan be automatically latched and. released coincident to actuating thetilting body lockingand releasing mechanism constituting the subjectmatter of an application for U. S. Letters Patent No. 44:7,298 filed onFebruary 23, 1921, so that damage resulting from premature operation ofthe hydraulic hoist mechanism is eliminated, as well as any possibilityof the premature operation of said mechanism, thereby assuringsynchronous cooperation of the hoist mechanism and the latching andreleasing mechanism for the successful dumping of the body oft-he truck,either sidewise'or' end.-

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Another object of the invention is the provision of a device or means ofthis character wherein it is necessary to operate the single hand leverfor controlling the tilting body locking and releasing mechanismconstituting the subject matter of the before mentioned applicationfiled on February 23rd 1921, by me, before the control valve of thehydraulic hoist mechanism can be actuated for the tilting of the dumpingbody of the truck, so that there is no possibililty of this controllingvalve being moved when the single hand lever is in neutral position withthe tilting body locking mechanism set'for locking the body of the truckagainst side or end tilting action, which would otherwise cause damageor destruction to the said body when the hydraulic hoist mechanismbecomes active and also when the sin le hand lever has been thrown orshifted it is. im-

possible to move the same to neutral position when the control valve hasbeen turned for the activlty of the hydraulic hoist mechanism andthereby defeating any change in the. tiltlng body locking and releasingmechan 1sm' from its previously selectedset condition with the resultthat safety is assured against counteraction between the hydraulic hoistmechanism and the tilting body looking and releasing mechanism for thesuccessful working of the dumping truck.

A further. object of the invention is to provide a simple, cheap andeffective structure adapted to accomplish the hereinbefore statedobjects and having certain details of structure and combination of partshereinafter more fully'set forth, while the scope of the application ofwhich will be indicated in the appended claims.

In the accompanying drawings: Figure 1 is a fragmentary top plan viewshowing in transverse section the single hand operating lever for thetilting body locking and releasing mechanism andv valve stem of thecontrol, valve for the hydraulic hoist mechanism, with the latchingdevice or means engaged with the control valve constructed in accordancewith the invention.

-Fig. 2 is a side elevation of the parts shown in Fig. 1 andincorresponding position, a portion of the base plate being broken awayto show in detail the mounting of thelatching device or means.

Fig. 3 is a fragmentary sectional view on the line 33 of Fig. 2.

Fig. 4 is a detail plan view of one part of the latching device.

Fig. 5 is a perspective view ofthe other part of the latching device ormeans.

Fig. 6 is a fragmentary plan view ofa motor truck of the tilting bodytypewith the latter removed showing in detail the construction andarrangement of the locking and releasing mechanism in association withthe latching device or means illustrated in detail in Figures 1 to 5inclusive.

Siniilar reference characters indicate corresponding parts throughoutthe several views in the drawings Referring to the drawings in detail,particularly in Fig. 6 thereof there is shown I generally the-spacedparallel longitudinal beams or sills A of the motor truck frameorchassis supporting forwardly thereof the drivers or operators seat B,while superimposed and fastened in any suitable man-'- 12 and 13 arelocated at the rear ends of the frame or chassis and constitute asupport for the tilting body or box (not shown).

Secured in any suitable manner upon the outer-lends of the bolsters orbeams. 10, 11

' cated or for and 12, 13 are keeper bearings 14 which constitute pairsof side bearings, while secured in any suitable manner tothe outermostbolster or beam 13 of the pair at the end of the truck frame or'chassisequally distant removed from the ends of said bolsteror beam 13 arekeeper bearings 15 constituting the end bearings, which latter with thebearings 14 cooperate with the body or box. vCoacting with the bearings14 and 15 are the respective pairs of latches-or catches 16 and 17 whichserve to lock the body or box and release the same for end dumpingaction, the latches or catches being actuated through I the medium olfconnections 18 with a single hand operating lever 19 and whichconstitutes the sub'ect matter of an application for a U. S. atentSerial number 447298, filed on the 23rd day of February, 1921 ashereinbefore referred to.

The latching device or means constituting the present invention andillustrated in Figures l to 5 inclusive of the drawings, comprises adetent or dog 20 having a collarlike eye 21 adapted to embrace and besplined' or keyed upon the shaft 22 carrying the single hand operatinglever 19 which is adapted to bemanipulated in the rack frame 23 thereforwhen shifted for controlling the latches or catches 16 and 17 to movethe same in selected pairs for the locking and releasing olf the body orbox of the truck as will be well understood from the subject matter ofthe application just referred to. The detent or do 20 is also formedwith a furlred end 24 for straddling the vertical actuating stem 25 ofacontrol -valve 26, the purpose, construction and operation of which isinvolved in the subject matter of my two pending applications filed onthe 9th d y of June 1919 and on the 3rd day of April 1920 seriallnumbered 302,880 and 371,045, respective y.

Surrounding the stem 25 and engaging the plug of the valve 26 is a head27, the same being made fast to said stem 25 and is cut .into onopposite sides in the upper portion thereof to constitute a flat sidedboss 28 and lateral rest shoulders 29 on opposite sides thereof. Thishead 27 is made fast upon the valve stem 25 so that when the valve 26 isin closed position the head 27 will have its boss 28 disposed inalinement with the longitudinal extent of the bifurcation in the forkedend 24 of the 'detent or dog 20 so lever. 19 is shiftedin, the rackframe 23 from v neutral position to the position shown by dotted linesin F ig. 30f the drawings the dog or detent'20 will be raised to thedotted position shown in said Fig. 3 thereby re leasing the valve 26 foractuation, whereby the said valve can be thrown to open position for theactivity of the hydraulic hoist mechanism; w i

On the shifting of the valve 26 the head 1 27 is correspondingly movedand in the opening of said valve the boss 28will be dis posed crosswiseof the forked end 24 of the detent or dog 20 so that thehand operatinglever 19 cannot be moved inversely to neutral position during theactivity of the hydraulic hoist mechanism, thus it being seen that thelatter and the tilting body locking and releasing mechanism cannot beworked counterwise to each other and in this manner perfect safety isassured for the successful operation o'f the dumping vehiclej From theforegoing it is thought thata clear and comprehensive understanding ofthe invention will be had and therefore a more extended explanation hasbeen omitted. What is claimed is: i 1. In a vehicle, a safety device ofthe character described, comprising a'latchi'ng means adaptedforcoaction with dumping, and locking and releasing mechanisms, andconstructed and arranged to be moved with one of said mechanisms topermit one mech-. anism to become operative and maintain the secondmechanism inoperative.

2. In a dumping vehicle, the combination with selective body locking andreleasing and dumping mechanisms for the dumping operation, and meanscoacting with and moved by one of said mechanisms to render oneoperative and maintain the other mecha nism inoperative.

' 3. In a dumping vehicle, a safety device of the character described,comprising a latching means adapted for coacting with body locking andreleasing and tilting mechanisms, and operated with one of themechanisms to move said latching means to render the said mechanismsalternately operable, said latching means including a forked member.

4. Pressure actuating means for tilting vehicle bodies, incombinationwith a controlling means, locking mechanism at, the sides and one end ofthe body normally retaining the same in a non-tilted position,

means controlling said locking mechanism whereby to selectively releasecertain of the same to allow tilting movement of the body in onedirection only, and latching means interconnected with said controlmeans for the locking mechanism and moved therewith for releasing saidpressure controlled means from normally inoperative position, only afterthe, actuation of the locking mechanism controlling means to any one ofits selective positions.

5. In a dumping vehicle, pressure actuating means for moving the tiltingbody ofv said vehicle, a valve included in said pressure means, lockingmechanism at the sides and one end of the body normally retaining thesame in a non-tilted position, means controlling said locking mechanismwhereby to selectively release certain 'of the same to allow tiltingmovement of the body in one direction only, a latching means-having aforked member adapted to be moved by the controlling means for 'saidlocking mechanism for engagement with the valve of the pressure means tohold the same inoperative when the locking mechanism is actuated toselectively release certain of the locking devices.

' '6. In a dumping vehicle, the'combination the means-for tilting thebox, a hand operable valve for regulating the pressuremeans, alongitudinally movable rod for controlling the locking means, anactuating lever carof means for locking each, side and one end of thevehicle box, mechanism for actuating the locking means selectively,means for tilting the box, pressure means foroperating ried by said rod,and a latching member carried by said rod and engageable with the valvefor holding the same inoperative when selectively moving the throwlever, said latching means being moved with the throw lever when shiftedto selective positions.

7.. In .a dumping vehicle, the combination of means for locking eachside and one end of the vehicle box, mechanism for actuating the lockingmeans selectively, means for tilting-the box, pressure means foroperating the meansfor tilting thebox, a hand operable valve forregulating the pressure means, "a longitudinally movable rod forcontrolling'the locking means, an actuating lever carried by said rod,and a latching member carried by' said rod and engageable with the valvefor holding the same inoperative. when selectively moving the throwlever, said latching means being moved with the throw lever when shiftedto selective positions, and meanson the valve to hold the latching meanswhen said valve is shifted to operative position and thus hold the throwlever against movement.

In testimony-whereof, I ahix my signature hereto.

GEORGE W. BERRY;

